Pneumatic-hammer support.



H. M. JAGDBS.

PNEUMATIG HAMMER SUPPORT.

APPLIGATION FILED NOV. 26, 1907.

Patented Apr. 19, 1910.

4ssHnIrrs-SHEET 1.

' H. M. JACOBS.

PNBUMATIG HAMMER SUPPORT.

APPLICATION HLBD Nov. 26, 1907.

955,166. Patented Apr. 19,1910.

3 SHEETS-SHEET 2.

warum asf. M.

v atto/mural.

ANDREW B. GRAHAM en. woraumuennusws. WASHINGTON. n. c

H. JACOBS. PNBUMATIG HAMMER SUPPORT.

APPLICATION FILED NOV. Z6, 1907.

Patented Apr. 19, 1910.

3 SHEETS-SHEET 3.

vANrmEw E. GRAHAM co, PHo'mumoGRAPHERs'wAsmNGTDN. M:

HENRY lVI. JACOBS, OF EUREKA, UTAH.

PNEUMATIC-)EIAMMER SUPPORT.

To all 'whom 'it may concern:

Be it known that I, HENRY M. JACOBS, a citizen of the United States,residing at Eureka, in the county of Juab, State of Utah, have inventedcertain new and useful Improvements in Pneumatic-Hammer Supports; and Ido hereby declare the following to bea full, clear, and exactdescription of the invent-ion, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to power hammers and more particularly to thatclass which are designed for use in connection with an ordinaryblacksmiths anvil and the primary object of the invention is to providea novel form of support for a hammer of this type, the support being soconstructed that the position of the hammer may be varied at the will ofthe operator.

In carrying out my invention I provide a support of such character thatthe hammer may be brought to position above any desired portion of theanvil and may be adjusted vertically above the anvil so as to shorten orlengthen the stroke of the hammer. The support is also so constructedthat the hammer may be swung to inoperative position with relation tothe anvil when not in use.

In the accompanying drawings, Figure 1 is a side elevation of thesupport showing it in operative relation with respect to an anvil, Fig.2 is a front elevation thereof, Fig. 3 is a rear elevation, Fig. 4 is atop plan view, Fig. 5 is a vertical longitudinal sectional View throughthe support, Fig. 6 is a vertical transverse sectional view through thesupport, Fig. 7 is a similar view but taken in another plane, and, Fig.8 is a detail vertical sectional view through the hammer, its cylinder,etc.

As shown in the drawings, the support comprises an upright which isindicated by the numeral 10 and which is formed at its lower end with abase indicated by the numeral 11. This upright is cylindrical and isarranged at its upper end for the reception of a journal 12 which isformed integral with a sleeve 13, the said sleeve being supported, byreason o-f the reception of the journal in the upper end of the upright,in a plane at right angles to the vertical plane occupied by the uprightand for rotation. Slidably engaged through this sleeve 18 is an arm 14which is cylindrical and is formed Specification of Letters Patent.

Application filed November 26, 1907.

Patented Apr. 19, 1914).

Serial No. 403,967.

at one of its ends with a large threaded bore or socket 15 into which isscrewed a threaded boss or head 16 which is formed integral with thepneumatic hammer as will be presently described.

The hammer mentioned above is, with the exception of one or two featureswhich will be specifically described, of the ordinary type and comprisesa cylinder indicated in general by the numeral 17, a valve chestindicated in general by the numeral 18, a pis ton 19, and a hammer head2O which is carried at the lower end of the piston or plunger. The head16 is formed integral with one wall 21 o-f a guide which includes, inaddition to the said wall 21, parallel si de walls 22 and an end wall23. rIhe opposing edges of the side walls 22 of the guide are formedeach with a longitudinally extending guide groove 24 and working inthese grooves are the beveled longitudinal edges 25 of a back plate 26which forms a portion of the cylinder 17 of the hammer. The guide abovementioned is disposed vertically and it will be understood that in thismanner, the hammer is supported for vertical adjustment.

In order that the hammer may be held in adjusted position, the backplate is formed with a lug 27 which projects between the side walls ofthe guide and which is formed with a threaded bore 28 through which isengaged an adjusting screw 29. This screw has a bearing at its lower endin the end v. all 23 and carries adjacent its lower end a worm gear 30with which meshes a worm 31. The worm 31 is provided with a crank handleby means of which it may be rotated and thereby rotate the worm gear 30and the adjusting screw 29, this rotation serving to raise or lower thehammer as will be readily understood.

Secured at its lower end by means of a screw bolt 33 to the head of thepiston 19 is a spring 34 this spring being connected at its upper end asat 35 to the upper end or head of the cylinder 17. This spring 34 servesto hold the piston normally raised and the advantage of thisconstruction will be apparent when it is considered that in this mannerthe hammer head is normally elevated above the anvil which willpresently be described, and as a consequence the work to be operatedupon may be properly placed beneath the hammer before the hammer is putin operation. It willfurther be understood in this connection, that thenumber of blows received by the work may be limited at the will of theoperator whereas heretofore it has been the practice to place the workbeneath the hammer after the hammer has been put in operation, thehammer nor mally resting upon the anvil or being at the lower limit ofits reciprocatory movement.

The compressed air supply pipe for the pneumatic hammer above describedis indicated b y the numeral 36 and is supported beside the sleeve 13and the arm 14 and the inner end of this pipe is turned to extendupwardly and over the said sleeve 13 and thence directed vertically asat 38, this last mentioned portion being positioned directly axiallywith respect to the upright 10 and having swivel connection with themain compressed air supply pipe which is indicated by the numeral 39, itbeing understood that this construction permits of the arm 14 and itssupporting sleeve 13 being turned or swung in a horizontal plane. To theouter end of the pipe 3G is connected a length of fiexible tubing orhose 40 and the other end of this tubing connects with an elbow 41 whichhas communication with the valve chest 13 of the pneumatic hammer.

From the foregoing it will be understood that the arm 14 may be adjustedlongitudinally in the sleeve 13 by reason of the fact that the hosesection 40 is tiexible. ln order that the arm 14 may be adjusted asstated above, itis provided in its under side with a slot 4:2 whichextends longitudinally thereof and to one side of which is formed aplurality of rack teeth 43, these teeth being extended in a continuousseries along the said edge of the slot.

Mounted in a suitable bracket 44 upon the sleeve 13 at one end thereofis a short shaft 45 and this shaft has xed to it a pinion 4G which worksin a recess formed in the said end of the sleeve 13, the shaft being`also provided with a crank handle 47 by means of which it may berotated. When so rotated, the pinion 4G, being in mesh with the rack 43,the arm 14 will be moved as above stated, either forwardly orrearwardly.

pivoted as at 4S within the sleeve 13 and extending with one of its arms45) through the slot 4Q in the arm 14 is an angle lever including' asecond arm 50. A valve 51 is interposed in the pipe 3G and this valvehas attached to its stem an arm 52 which extends through a slot 53formed in the adjacent side of the arm 1l. Attached to the end of thislarm 52 is one end of a cable 54 the other en d of the cable beingconnected te the end of the arm 45) of the angle lever.

A similar cable 55 is connected to the end of the arm of the angle leverand depends therefrom and is connected at its lower end to a lever whichis indicated by the numeral and is mounted for rocking movement througha slot formed in the base of the standard 10. The outer end of thislever 55 is pivoted to a lever 5G which is bent at its middle to form acrank portion 57. That portion of the lever 5G which lies to the otherside of its crank portion 57 is indicated by the numeral 58 and thelever is pivoted as at 59 at the lower bend of its crank portion 57 in asuitable bracket G0 upon the base 11 of the support. At the end of theportion 58 of the lever there is formed a foot piece G1 which may bedepressed to rock the lever and consequently the lever 55 and tighten orslacken the cable 55, there being' a weight G2 adj ustably supportedupon the Iirst mentioned portion of the lever 5G which weight tends tonormally lower this end of the lever and in so doing slacken the cable55.

The valve 51 is controlled by means of a spring (S3 which tends to throwit to closed position it being understood that by depressing the footpiece (51 a pull will be exerted upon the cables 55 and 54 and the valveopened against the tension of its controlling spring.

From the foregoing description of my invention it will be seen that lhave provided a support for a pneumatic hammer of such character thatthe hammer may be brought to position over any portion of the anvil,which in the accompanying drawings is indicated by the numeral and is ofthe ordinary construction, and that the hammer may also be raised andlowered with respect to said anvil.

YWhat is claimed, is-

.;i support for pneumatic hammers comprising a hollow base memberprovided with a broadened bottom portion, a hollow T- shaped membersupported on said base member, a. tubular arm carried in said hollowmember, said arm being arranged to slide in the T-shaped member and theT-shaped member being rotatable with reference to the base member,slides mounted on one end of said arm, and a hammer casing mounted insaid slides.

1n testimony whereof, I atlix my signature, in presence of twowitnesses.

HENRY M. JACOBS. lVitnesses:

G. A. Frankie, E. H. PULvnn.

